My Hips Ache All The Time. Internal Rotation Causes Me

My hips ache all the time. Internal rotation causes me a lot of pain. They hurt when I squat the most and it constricts me from going deep into a squat. I am only 17 years old and when I sit for long periods of time my hips get really achy. Also, the muscles around my hips are always sore, especially deep near the joint. The pain I feel is like a pinching pain and it feels like my bones are grinding.